Fire retardant door



April 17, 1951 B. KATz ET AL FIRE RETARDANT DOOR 2 Shee'ts-Shee'i; l

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B KATZ ET AL FIRE RETARDANT DOOR April 17, 1951 Filed Nov. 9, 1944 PatentedY Apr. 17, 1951 FIRE RETARDANT DOOR Benne Katz and Jack Schwartzberg,

Brooklyn, N. Y.

Application November 9, 1944, Serial No.\562,726

This invention relates generally to fire-retardant material, but more specifically to fire-retardV ant doors. j

The main object of the invention resides in the provision of a fire-retardant door having a central panel novelly secured in the frame thereof whereby the door when heated by exposure to a high temperature and chilled as by a water jet or other fire extinguishing elements will not through warping or other conditions form gaps between the elements of said door to result in the formation of openings between the spaces or rooms separated by the door.

A further object of the invention resides in the provision of a fire-retardant door wherein the frame elements carrying metal sheathings are pre-fabricated and wherein the panel member carrying metal sheathings is also pre-fabricated.

A further object of the invention resides in the provision of a fire-retardant doorA wherein the sheathing of the pre-fabricated parts contribute to the formation of tight joints in the assembly thereof.

These objects and other incidental ends and advantages of the invention will hereinafter appear in the progress of the disclosure and as pointed out in the appended claims.

Accompanying this specification are drawings showing a preferred form of the invention wherein corresponding reference characters designate corresponding parts throughout the several views and wherein:

Figure l is a front view in elevation showing the fire-retardant door in assembled and operable condition.

Figure 2 is a sectional view of a portion of the door throughthe plane 2-2 of Figure l.

Figure 3 is a fragmentary view in perspective showing a corner of the door.

Figure 4 is asectional view of a portion of the tardant door generally designated by numeral Il) is comprised of a frame and a central panel. The frame consists of a pair of stiles II, l Ia and a pair of rails I2 and IZa. A central panel I3 is provided to cooperate with the frame for junc- 3 Claims; Cl; 20-3'5) 2 tion therewith, said panel I3 being cut out on the sides and ends thereof to form a plurality of spaced and preferably evenly distributed tenons I4 adapted for forming joint elements with corresponding mortises I5 disposed in the inner walls of stiles II, IIa and rails I2, I2a.

The door frame elements and the panel I3 are. provided with non-inflammable sheathings such' as sheet steel, said sheathings being applied in'- dependently to the door frame elements as each stile and rail and the panel before assembly. Stiles I I, I Ia and rails I2, I2a of the door frame are formed from heat non-conducting material such as wood, the mortises I5 cut out from the inner walls being formed in the conventional manner. The sheathing for the surfaces of the stiles and rails consists of the provision of a primary metallic channel I9 for the outer faces and portions of the adjacent side walls of the Stiles and rails,` said channel I9 terminating at the inner ends in pre-formed clincher heads 20.

Clincher heads 2li receive offsetlegs 21| `of a metallic and channelled member 22 for the inner faces and the adjacent sidewall portions of the Stiles II, IIa and rails I2, IZa. Heads 20 also receiveV offset legs 23a super-posing legs 2| for anchorage purposes with heads 2B, said legs 23a forming part of a third metallic sheathing channelled member 23, the sides of which at the inner ends abut the sides of channelled member 22 and the base of which at an inverted and intermediate channelled portion 24 rests on the base of channelled member 22 as best shown in Figure 4.

The side and bottom walls of inverted channelled portion 24 form the frictional engaging means for the perimetric edges and adjacent walls of panel member I3 at the areas adjacent the tenons I4. The base `of channelled member 22 and the base of inverted channel portion 24 of channelled member 23 wherever positioned over the mortises I5 at the inner walls of stiles I I, IIa and rails I 2, I2a are cut out to admit y the tenons I4 of panel I3 within the said mortises all as best shown in Figure 2, the cut outs being indicated respectively by numerals 22a and 24a. Panel I3 is also provided with metallic face sheathings I'I, I'I.

The end faces of the stiles Il, Ila adjacent the mortises I5 are sheathed preferably by flanged extensions or tongues 25 proceeding from the offset legs 241) of inverted channel portion 24 as shown in Figure 6. The full end faces of rails I2, I 2a are sheathed by the plates 26.

Production of the door as described anticipates the initial pre-cutting and forming of the stiles II, IIa and rails I2, I2a including the formation of mortises I5; and the initial and pre-cutting of panel I3 including tenons I 4. The tenons Il! and mortises I5 are the integrating means for the formation of said door While the sides of inverted channel portions 24 also frictionally hold the edges of panel I3 in place. All the component parts of the door such as they Stiles I i I la, rails I2, I2a. and panel it are separately sheathed prior to unication thereof by suitable assemblage. It is to be noted that the clincher heads: 20 of channel I9 are compressed against the elements of channels 22 and 23 before engagement' of mortises I5 and tenons I 4, said compression integrating the sheathing about all the faces of l the stiles and rails before assembly.

We wish it understood that minor changes and* variations in the material, integration, location and number of parts may all be resorted to without departing from the spirit of the invention and the scope of the appended claims.

We claim:

1;. In a fire-retardant door including a panel `member having the edges thereof provided with tenons, stile and rail frame members having arrangedthereinv mortises to receive said tenons, fire-proof; sheathing mounted on said panel", and arranged to abuty the mortise walls of the stile and rail frame members at; the tenons of said panel, and nre-proof sheathing enveloping said stilev and' rail members. said second mentioned sheatlfiingy having openings adjacent the lmouths of the mortises.

2; In a lire-retardant door including a panel member having the edges thereof provided with tenons', stile and rail frame members having arranged therein mortises to receive said tenons, fire-proof sheathing mounted on said panel and arranged to abut the mortise. walls of the stile and rail frame membersy at the tenons of said panel, fire-proof sheathing enveloping said s tiles and rail members said second mentioned sheathing having openings adjacent the mouths of the Vfaces of said panel, a non-metallic frame comprised-of similar non-metallic stiles and rails each Vprovided at the inner edges with spaced mortises for engagement with corresponding tenons of said panel, metallic sheathing for the external faces of the Stiles and rails and-provided with openings at the inner walls opposite said mortises, an auxiliary metallic reception'sheathing member for each of said Stiles and rails secured to the sheathing thereof andv having an inverted channel formed at the base thereof, the base of said inverted channel abutting the rst mentioned sheathing inner walls and having openings in registration with the iirst mentioned sheathing openingslfor penetration therethrough of saidV tenons, the side walls of said inverted channel frictonally engaging the sheathed front and rear faces', of said panel and the base of said inverted channel receiving the edgesof said sheathed panel adjacent the tenons..

BENNE' KATZ'.

JACK SCHWARTZBERG.

REFERENCES CITED The. following references are oi recordV in the file of. this patent:

UNITED STATES' PATENTS Number Name Date V588,527 Horcheler Aug. 17, 1897 1,689,823V Goddard Oct. 30, 1928 2,021,375 Peelle Nov. 19, 1935 

